以Gd2O3、Sm2O3、Yb2O3和ZrOCl2·8H2O为原料,采用化学共沉淀法合成了一种新型的多元稀土锆酸盐(Gd0.4Sm0.5Yb0.1)2Zr2O7陶瓷粉体,在1600℃无压烧结10h合成了致密的陶瓷块体.用X射线衍射仪(XRD)及场发射扫描电镜(SEM)对粉体和块体的微观结构进行了表征,采用激光闪射法测试了块体的导热性能.结果表明,制备的多元稀土锆酸盐陶瓷粉体具有焦绿石结构,晶粒细小,陶瓷的热导率明显低于一元稀土锆酸盐Sm2Zr2O7的热导率.该研究结果显示(Gd0.4Sm0.5Yb0.1)2Zr2O7多元稀土锆酸盐陶瓷有可能应用于热障涂层陶瓷层材料.
参考文献
| [1] | Padture NP;Gell M;Jordan EH .Materials science - Thermal barrier coatings for gas-turbine engine apptications [Review][J].Science,2002(5566):280-284. |
| [2] | Clarke D R;Levi C G .[J].Annual Reviews of Materials Research,2003,33:383. |
| [3] | Henry Lehmann;Dieter Pitzer;Gerhard Pracht .Thermal Conductivity and Thermal Expansion Coefficients of the Lanthanum Rare-Earth-Element Zirconate System[J].Journal of the American Ceramic Society,2003(8):1338-1344. |
| [4] | Bast U;Schumann E .[J].Ceramic Engineering and Science Proceedings,2002,23:525. |
| [5] | 梁英教;车荫昌.无机物热力学数据手册[M].沈阳:东北大学出版社,1993 |
| [6] | Jindrich Leitner;Pavel Chuchvalec;David Sedmidubsky et al.[J].Thermochimica Acta,2003,395:27. |
| [7] | Chen H.;Ding CX. .Nanostructured zirconia coating prepared by atmospheric plasma spraying[J].Surface & Coatings Technology,2002(1):31-36. |
| [8] | Jie Wu;Xuezheng Wei;Nitin P. Padture .Low-Thermal-Conductivity Rare-Earth Zirconates for Potential Thermal-Barrier-Coating Applications[J].Journal of the American Ceramic Society,2002(12):3031-3035. |
| [9] | Xu Qiang;Pan Wei;Wang Jingdong et al.[J].Materials Letters,2005,59:2804. |
| [10] | Berman R.Thermal Conduction in Solids[M].Oxford:Clarendon Press,1976 |
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